#define _CRT_SECURE_NO_WARNINGS 1
#include <stdio.h>

int main()
{
    int a[4] = { 1, 2, 3, 4 };
    int* ptr1 = (int*)(&a + 1);
    int* ptr2 = (int*)((int)a + 1);
    printf("%#x,%#x", ptr1[-1], *ptr2);

    return 0;
}
